Diana G. Gallagher is an American filker, fan artist and author who writes books for children and young adults based on television series. She has contributed to book series based on Buffy the Vampire Slayer, Sabrina the Teenage Witch and Charmed, among others.

Born in Paterson, New Jersey, she now lives in Florida. Until his death in 2011, she had been married to the filker and writer Marty Burke. She sometimes also writes under the name Diana Burke.